diff --git a/pipi/context.c b/pipi/context.c
index f306dde..72e313e 100644
--- a/pipi/context.c
+++ b/pipi/context.c
@@ -90,7 +90,7 @@ pipi_command_t const *pipi_get_command_list(void)
         { "screen", 0 },
         { "overlay", 0 },
         { "line", 1 },
-        { "wave", 1 },
+        { "sine", 1 },
 
         /* End marker */
         { NULL, 0 }
@@ -822,7 +822,7 @@ int pipi_command(pipi_context_t *ctx, char const *cmd, ...)
                        x1,  y1,  x2,  y2, color, aa);
         ctx->nimages++;
     }
-    else if(!strcmp(cmd, "wave"))
+    else if(!strcmp(cmd, "sine"))
     {
         pipi_image_t *tmp;
         char const *arg;
@@ -842,7 +842,7 @@ int pipi_command(pipi_context_t *ctx, char const *cmd, ...)
             return -1;
 
         tmp = ctx->images[ctx->nimages - 1];
-        ctx->images[ctx->nimages - 1] = pipi_wave(tmp, dw, dh, d, a);
+        ctx->images[ctx->nimages - 1] = pipi_sine(tmp, dw, dh, d, a);
         pipi_free(tmp);
     }
     else
diff --git a/pipi/filter/wave.c b/pipi/filter/wave.c
index 416fc45..9851f4c 100644
--- a/pipi/filter/wave.c
+++ b/pipi/filter/wave.c
@@ -13,7 +13,7 @@
  */
 
 /*
- * wave.c: wave and warping effects
+ * wave.c: wave and other warping effects
  */
 
 #include "config.h"
@@ -28,7 +28,7 @@
 
 #define BORDER 64
 
-pipi_image_t *pipi_wave(pipi_image_t *src, double dw, double dh,
+pipi_image_t *pipi_sine(pipi_image_t *src, double dw, double dh,
                         double d, double a)
 {
     pipi_image_t *dst;
diff --git a/pipi/pipi.h b/pipi/pipi.h
index a9dacf7..f2e9f8b 100644
--- a/pipi/pipi.h
+++ b/pipi/pipi.h
@@ -199,7 +199,7 @@ __extern pipi_image_t *pipi_median(pipi_image_t *, int);
 __extern pipi_image_t *pipi_median_ext(pipi_image_t *, int, int);
 __extern pipi_image_t *pipi_dilate(pipi_image_t *);
 __extern pipi_image_t *pipi_erode(pipi_image_t *);
-__extern pipi_image_t *pipi_wave(pipi_image_t *, double, double,
+__extern pipi_image_t *pipi_sine(pipi_image_t *, double, double,
                                  double, double);
 
 __extern pipi_image_t *pipi_order(pipi_image_t *);